Speaker
Dr
Huan Chen
(China University of Geosciences (Wuhan))
Description
We calculate the chiral condensate in cold quark matter in Dyson-Schwinger equation approach of QCD. Different ansatz for the quark-gluon vertex and the effective interactions are investigated. Then, using a model-independent formula from the Feynmann-Hellmann theorem, we evaluate the pion-nucleon sigma term. We obtain the value of sigma term about 60 MeV, which weakly depends on our different model ansatz and is consistant with recent experimental results.
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Primary author
Mr
Jing-Hui Huang
(China University of Geosciences)
Co-author
Dr
Huan Chen
(China University of Geosciences (Wuhan))
